Nano-encapsulated organic phase change material based on copolymer nanocomposites for thermal energy storage
Nano-encapsulated organic phase change material based on copolymer nanocomposites for thermal energy storage
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DOI：
10.1016/j.energy.2014.01.033
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发表时间：
2014-03-01
期刊：
影响因子：
9
通讯作者：
Rafeadah, R.
中科院分区：
文献类型：
--
作者：
Tumirah, K.;Hussein, M. Z.;Rafeadah, R.
本论文主要研究了正十八烷纳米胶囊作为有机相变储能材料的制备、物化表征和热性能。采用细乳液原位聚合法，以正十八烷为核，苯乙烯-甲基丙烯酸甲酯共聚物为壳，制备了纳米胶囊化的有机相变材料。系统研究了St/MMA和正十八烷/共聚物质量比对包覆过程、所得纳米胶囊的理化性能和热性能的影响。DSC（差示扫描量热计）分析表明，纳米胶囊形式的正十八烷在29.5 ℃熔化，在24.6 ℃结晶。正十八烷纳米胶囊的熔融和结晶焓分别为107.9和104.9 Jg-1。热重分析（TGA）热分析表明，纳米胶囊化的有机PCM降解的两个可区分的步骤，并具有良好的化学稳定性。对纳米电容器进行了360次加热/冷却循环的热循环测试，结果表明所开发的纳米材料具有良好的化学稳定性和热可靠性。基于所获得的所有结果，可以得出结论，正十八烷/St-MMA纳米胶囊具有用于建筑物和其他应用的热能储存的潜力。(c)2014爱思唯尔有限公司版权所有。
This study deals with fabrication, physico-chemical characterizations and thermal properties of n-octadecane nanocapsules as organic PCM (phase change materials) for TES (thermal energy storage). Nano-encapsulated organic PCM was fabricated by encapsulation of n-octadecane as a core with St (styrene) - MMA (methylmethacrylate) copolymer shell using miniemulsion in-situ polymerization method. The influence of St/MMA and n-octadecane/copolymer mass ratio on the encapsulation processes, physico-chemical and thermal properties of the resulting nanocapsules has been studied systematically. DSC (differential scanning calorimeter) analysis indicated that the n-octadecane in the nanocapsules form melts at 29.5 degrees C and crystallize at 24.6 degrees C. N-octadecane nanocapsules has an enthalpy of 107.9 and 104.9 Jg-1 for melting and crystallization, respectively. TGA (thermal gravimetric analysis) thermograms showed that the nano-encapsulated organic PCM degraded in two distinguishable steps and has a good chemical stability. The thermal cycling test of the nanocapsules was carried out for 360 heating/cooling cycles and indicates that the developed nanomaterial has good chemical stability and thermal reliability. Based on all the results obtained, it can be concluded that n-octadecane/St-MMA nanocapsules have potential for thermal energy storage for buildings and other applications. (c) 2014 Elsevier Ltd. All rights reserved.